Holt James J
Department of Otolaryngology-Head and Neck Surgery, Marshfield Clinic, 1000 N Oak Ave, Marshfield, WI 54449, USA.
Ann Otol Rhinol Laryngol. 2007 Jun;116(6):457-61. doi: 10.1177/000348940711600611.
This study defines the anatomy of the posterior sinus of the middle ear and its relationship with the sinus tympani.
Fifty-one temporal bone plugs harvested from human cadavers were studied. The depth and width of the posterior sinus, its relationship to surrounding structures, and the structure that separates it from the sinus tympani were studied.
The posterior sinus, positioned just posterior to the oval window, was 1 mm or less in depth, and the width of the opening 1.5 mm or less. A ridge of bone from the floor of the middle ear separated the posterior sinus from the sinus tympani in 82% of specimens. In 10% a sheet of bone separated the two sinuses, and in 8% the sinus tympani and posterior sinus formed one confluent recess.
This is the first study that describes the anatomy of the posterior sinus of the middle ear. This sinus is separated from the more inferiorly located sinus tympani by a ridge of bone, not by the ponticulus as was previously thought, and it is no larger than 1 mm in depth and 1.5 mm in width. The results from this study give the otologic surgeon knowledge of middle ear anatomy that he or she can use when removing cholesteatoma, granulation tissue, or retracted epithelium from the posterior tympanum.
本研究旨在明确中耳后窦的解剖结构及其与鼓室窦的关系。
对从人类尸体获取的51块颞骨标本进行研究。研究后窦的深度和宽度、其与周围结构的关系，以及将其与鼓室窦分隔开的结构。
后窦位于卵圆窗后方，深度为1毫米或更小，开口宽度为1.5毫米或更小。在82%的标本中，中耳底部的骨嵴将后窦与鼓室窦分隔开。在10%的标本中，一层骨片将两个窦分隔开，在8%的标本中，鼓室窦和后窦形成一个汇合隐窝。
这是第一项描述中耳后窦解剖结构的研究。该窦与位置更低的鼓室窦由骨嵴分隔，而非如先前认为的由小桥分隔，其深度不超过1毫米，宽度不超过1.5毫米。本研究结果为耳科医生在清除鼓室后部胆脂瘤、肉芽组织或内陷上皮时提供了中耳解剖学知识。
